const path = require('path')
const HTMLPlugin = require('html-webpack-plugin')
const webpack = require('webpack')
const ExtractPlugin  = require('extract-text-webpack-plugin')

const isDev = process.env.NODE_ENV==='development'

console.log('isDev',process.env.NODE_ENV )

const config = {
    target: 'web',
    entry: path.join(__dirname,'src/index.js'),
    output: {
        filename: 'bundle.[hash:8].js',
        path: path.join(__dirname,'dist')
    },
    module:{
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader'
            },
            {
                test: /\.jsx$/,
                loader: 'babel-loader'
            },
            
            
            {
                test: /\.(gif|jpg|jpeg|png|svg)$/,
                use: [{
                    loader: 'url-loader',
                    options: {
                        limit: 1024,
                        name: '[name]-aaa.[ext]'
                    }
                }]
            }
        ]
    },
    plugins: [
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: isDev?'"development"': '"production"'
            }
        }),
        new HTMLPlugin()
    ]
}


if (isDev) {
    config.module.rules.push({
                test: /\.styl/,
                use: [
                    'style-loader',
                    'css-loader',
                    {
                        loader: 'postcss-loader',
                        options: {
                            sourceMap: true,
                        }
                    },
                    'stylus-loader'
                ]
            })
    config.devtool = '#cheap-module-eval-source-map'
    config.devServer = {
        port: 8000,
        host: '0.0.0.0',
        overlay: {
          errors: true,
        },
        open: true,
        hot: true
      }

      config.plugins.push(
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoEmitOnErrorsPlugin()
  )
}else {
    config.entry = {
        app: path.join(__dirname,'src/index.js'),
        vendor: ['vue']
    }
    config.output.filename='[name].[chunkhash:8].js'
    config.module.rules.push({
          test: /\.styl/,
          use: ExtractPlugin.extract({
            fallback: 'style-loader',
            use: [
                'css-loader',
                {
                        loader: 'postcss-loader',
                        options: {
                            sourceMap: true,
                        }
                    },
                    'stylus-loader'
            ]
          })
    })
    config.plugins.push(
        new ExtractPlugin('styles.[contentHash:8].css')
        ,
        new webpack.optimize.CommonsChunkPlugin({
            name: 'vendor'
        }),
        new webpack.optimize.CommonsChunkPlugin({
            name: 'runtime'
        })
        )
}

module.exports = config